//
//  CZStatusRetweetView.swift
//  Blog
//
//  Created by whitcast on 16/7/13.
//  Copyright © 2016年 itcast. All rights reserved.
//

import UIKit
import SnapKit
//  转发微博视图
class CZStatusRetweetView: UIView {
    // 记录转发微博底部约束
    var retweetViewBottom: Constraint?
    //  持有的viewModel
    var statusViewModel: CZStatusViewModel? {
        didSet {
            //  设置转发微博内容
            contentLabel.text = statusViewModel?.retweetContent
            // 卸载上一次底部约束
            retweetViewBottom?.uninstall()
            // 判断是否又转达微博配图
            if let count = statusViewModel?.status?.retweeted_status?.pic_urls?.count where count > 0 {
                // 有配图
                pictureView.picUrls = statusViewModel?.status?.retweeted_status?.pic_urls
                self.snp_updateConstraints(closure: { (make) -> Void in
                    self.retweetViewBottom = make.bottom.equalTo(pictureView).offset(HomeCellMargin).constraint
                })
                pictureView.hidden = false

            }else {
                // 没有配图
                pictureView.hidden = false
                self.snp_updateConstraints(closure: { (make) -> Void in
                    self.retweetViewBottom = make.bottom.equalTo(contentLabel).offset(HomeCellMargin).constraint
                })

            }
            
        }
    }
    
    // MARK: -- 懒加载控件
    private lazy var contentLabel: UILabel = {
        let label = UILabel(textColor: UIColor.grayColor(), fontSize: 14)
        //  多行显示
        label.numberOfLines = 0
        return label
    }()
    // 转发微博配图
    private lazy var pictureView: CZStatusPictureView = {
       let collectionView = CZStatusPictureView()
        collectionView.backgroundColor = self.backgroundColor
        return collectionView
    }()
    
    
    override init(frame: CGRect) {
        super.init(frame: frame)
        setupUI()
    }
    
    required init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
    
    //  添加视图设置约束
    private func setupUI() {
        contentLabel.backgroundColor = UIColor(white: 0.95, alpha: 1)
        //  添加控件
        addSubview(contentLabel)
        addSubview(pictureView)
        //  设置约束
        contentLabel.snp_makeConstraints { (make) -> Void in
            make.top.equalTo(self).offset(HomeCellMargin)
            make.leading.equalTo(self).offset(HomeCellMargin)
            make.trailing.equalTo(self).offset(-HomeCellMargin)
            
        }
        
        pictureView.snp_makeConstraints { (make) -> Void in
            make.leading.equalTo(contentLabel)
            make.top.equalTo(contentLabel.snp_bottom).offset(HomeCellMargin)
        }
        
        //  关键的约束
        //  转发微博视图的底部约束等于我们转发内容label的底部约束加上一个间距
        self.snp_makeConstraints { (make) -> Void in
        //  make.bottom.equalTo(contentLabel).offset(HomeCellMargin)
        //  make.bottom.equalTo(pictureView).offset(HomeCellMargin)
            self.retweetViewBottom = make.bottom.equalTo(pictureView).offset(HomeCellMargin).constraint
        }
        
        
        
        
        
    }
    
    
    
}
